Tial blow off valve 11 psi spring to Tial Q and Tial QR (yellow)

For: Tial Q and QR BOV series

TiAL® Blow Off Valve Springs are designed to work in all of their blow off valve models including the BV 50mm, Alpha Q, Q and QR valves. You should select the BOV spring pressure rating based on your engine's vacuum reading at idle, once the engine has reached operating temperature. However, the pressure ratings will vary depending on the model blow off valve you have, so please reference the chart below to ensure you are purchasing the correct spring for your application. The green spring should only be used on supercharged vehicles, on quick spooling turbos the valve can actually open briefly before raching the manifold, dumping the boost. TiAL® Blow Off Valves need a 1/4" inner diameter source that is direct to the manifold, smaller lines and additional T-fittings can cause delays in response time.